Genetic deletion in uncoupling protein 3 augments 18F-fluorodeoxyglucose cardiac uptake in the ischemic heart

Sara Gargiulo, Maria P. Petretta, Adelaide Greco, Mariarosaria Panico, Michele Larobina, Matteo Gramanzini, Gabriele G. Schiattarella, Giovanni Esposito, Mario Petretta, Arturo Brunetti, Alberto Cuocolo

Research output: Contribution to journalArticlepeer-review

Abstract

Background: We investigated the effects of uncoupling protein 3 (UCP3) genetic deletion on 18F-fluorodeoxyglucose (FDG) cardiac uptake by positron emission tomography (PET)/computed tomography (CT) dedicated animal system after permanent coronary artery ligation.Methods: Cardiac 18F-FDG PET/CT was performed in UCP3 knockout (UCP3-/-) and wild-type (WT) mice one week after induction of myocardial infarction or sham procedure.Results: In sham-operated mice no difference in left ventricular (LV) volume was detectable between WT and UCP3-/-. After myocardial infarction, LV volume was higher in both WT and UCP3-/- compared to sham animals, with a significant interaction (p < 0.05) between genotype and myocardial infarction. In sham-operated animals no difference in FDG standardized uptake value (SUV) was detectable between WT (1.8 ± 0.6) and UCP3-/- (1.8 ± 0.6). After myocardial infarction SUV was significantly higher in remote areas than in infarcted territories in both UCP3-/- and WT mice (both p < 0.01). Moreover, in remote areas, SUV was significantly higher (p < 0.001) in UCP3-/- as compared to WT, while in the infarcted territory SUV was comparable (p = 0.29). A significant relationship (r = 0.68, p < 0.001) between LV volume and SUV was found.Conclusions: In a mice model of permanent coronary occlusion, UCP3 deficiency results in a metabolic shift that favored glycolytic metabolism and increased FDG uptake in remote areas.

Original languageEnglish
Article number98
JournalBMC Cardiovascular Disorders
Volume14
Issue number1
DOIs
Publication statusPublished - Aug 8 2014

Keywords

  • Glucose metabolism
  • Myocardial infarction
  • Positron emission tomography
  • Uncoupling protein

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Medicine(all)

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